Chuangui Yang Liang Mi Xingbao Liu Yangqiu Xia Qiang Teng Han Lin Uncertainty evaluation of measurement of orientation repeatability for industrial robots. 207-217 2020 47 Ind. Robot 2 https://doi.org/10.1108/IR-07-2019-0145 db/journals/irob/irob47.html#YangMLXTL20